I did as suggested and my grouper.log file is empty. I am seeing
this in catalina.out.2006-01-18.txt:

java.util.MissingResourceException: Can't find resource for bundle
edu.internet2.middleware.grouper.ui.util.ChainedResourceBundle, key
plugin.personalstem
at java.util.ResourceBundle.getObject(ResourceBundle.java:326)
at java.util.ResourceBundle.getString(ResourceBundle.java:286)
at edu.internet2.middleware.grouper.ui.SessionInitialiser.init
(SessionInitialiser.java:162)
at edu.internet2.middleware.grouper.ui.SessionInitialiser.init
(SessionInitialiser.java:79)
at org.apache.jsp.WEB_002dINF.jsp.initPreLoginSession_jsp._jspService
(org.apache.jsp.WEB_002dINF.jsp.initPreLoginSession_jsp:84)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:99)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service
(JspServletWrapper.java:325)
at org.apache.jasper.servlet.JspServlet.serviceJspFile
(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:252)

...
For your login problem have you turned logging on (to DEBUG) for
the Subject API in grouper/conf/log4j.properties? The final
exception is not indicative of low level errors that nay have
occurred, but these low level errors might be logged.